Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 5: Atomic systems in external fields

A 5.3: Vortrag

Montag, 23. März 2015, 15:00–15:15, C/kHS

3He magnetometer for extreme precision measurement of high magnetic field — •Andreas Maul1, Anna Nikiel1, Peter Blümler1, Werner Heil1, Ernst Otten1, Sergej Karpuk2, Manfred Hehn3, Laura Schreiber4, and Maxim Terekhov41Institute of Physics, Johannes Gutenberg-Universität Mainz — 2Institute for Nuclear Chemistry, Johannes Gutenberg-Universität Mainz — 3MPI for Polymer Research, Mainz — 4University Medical Center Mainz

Precise measurements and monitoring of high magnetic field are required for instance in high resolution mass spectroscopy using Penning traps or in the g-2 muon experiment. Our approach uses nuclear magnetic resonance detection on gaseous, nuclear spin-polarized 3He. The nuclei of the 3He gas are spin-polarized in-situ using a new, non-standard variant of the Metastability Exchange Optical Pumping (MEOP). The essential point is that coherent spin-precession times (T2*) of several minutes can be obtained in fields of > 1 Tesla [1]. From the measured Larmor frequency the local magnetic field can be determined with an relative accuracy better than 10−12. Such a device can be miniaturized to fit next to a Penning trap in order to monitor and determine magnetic fields even at low temperatures and ultrahigh vacuum conditions. The current status and first results of the experiment will be presented.

[1] A. Nikiel, P.Blümler, W.Heil, M.Hehn, S.Karpuk, A.Maul, E.Otten, L.M.Schreiber, and M.Terekhov, Eur. Phys. J. D, 68 (2014), 330

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